Calls for help, Problems, Breakdowns, Mechanical & Electrical
Post Reply
User avatar
Forum Contributor
Posts: 79
Joined: Thu Jul 20, 2017 5:59 pm
Car Details: D2


Post by hangman3 » Mon Mar 12, 2018 7:53 pm

Got a few electrical issues on the D3 & while checking the other day I found that Its getting 16.5 - .7v when charging. Any ideas why this might be & how to sort it?

User avatar
Posts: 12149
Joined: Mon Feb 15, 2010 1:37 pm
Winner: Technical Post 2012, 2013
Comedian of the Year 2014
Car Details: 2007 HSE
Member Since: 15 Feb 2010
Location: Sunny Shropshire!

Re: Overcharging??

Post by Bodsy » Mon Mar 12, 2018 9:34 pm

That’s definitely too high!

Couple of reasons for that.

Alternator broken
Battery broken
Earthing points loose somewhere.

Check http://tinyurl.com/brakebible
Here for How to change your Brake Pads, Disks, EPB Shoes Adjust, removal, cleaning & fitting Guide.

IID Pro Multivehicle. D3, D4, RRSport pre and post 2010, FFRR.
Gearbox Transmission Flushes and much more

Disco3Club Chairman

User avatar
Site Admin
Posts: 19132
Joined: Sat May 15, 2010 8:01 pm
Winner: Club Member of Year 2012 & 13
Car Details: BMW 530d M Sport
Member Since: 17 May 2010
Location: Solihull, West Midlands

Re: Overcharging??

Post by anglefire » Mon Mar 12, 2018 11:03 pm

Or wrong alternator fitted - some "cheap" ones I seem to remember didn't regulate correctly and overcharged. Causes all sorts of issues.


Waeco CFX 40
BMW 530d M Sport Touring, 1977 Triumph Spitfire 1500
2006 disco3 SE. Gone but not forgotten.
Member of Admin team and :ugeek:
Disco3Club Photos: Here

User avatar
Forum Contributor
Posts: 79
Joined: Thu Jul 20, 2017 5:59 pm
Car Details: D2

Re: Overcharging??

Post by hangman3 » Tue Mar 13, 2018 8:03 am

Cheers guys, Will look into it & let you know.

User avatar
Committee Member
Posts: 7583
Joined: Wed Apr 07, 2010 8:17 am
Winner: Avatar of the Year 2012
Comedian of the Year 2013
Mechanic of the Year 2014
Clube Member of the Year 2014
Car Details: Disco3 TDV6 HSE 2007
Member Since: 29 Jun 2013
Location: http://goo.gl/maps/WGOsq

Re: Overcharging??

Post by PillowSmuggler » Thu Mar 15, 2018 12:52 pm

Isn't the aircon module also involved in charging voltage (allowing the outside temperature to increase voltage to aid low temp charging)?
With that in mind, a good earth to those radio/aircon modules is also going to be important, and I think those are the ones down at the bottom of the driver and passenger footwells, for instance behind the side panel under the bonnet release.

Having said that, every time my charge voltage has gone wrong, it has for me always been the alternator itself.

Regards, Dom.
2007 HSE Auto TDV6
Snorkel, Cyclonic air filter, GNVP Rock Sliders
78Ah Aux, Split charge, FBH Timer/Remote, Mantec sump plate
LED: Strobes, interior, camping, brake, running, sides
New Oil Pump, using 2SO at 1:400.

Post Reply